Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga.

ABSTRACT: Ocean acidification (OA) is predicted to enhance photosynthesis in many marine taxa. However, photophysiology has multiple components that OA may affect differently, especially under different light environments, with potentially contrasting consequences for photosynthetic performance. Furthermore, because photosynthesis affects energetic budgets and internal acid-base dynamics, changes in it due to OA or light could mediate the sensitivity of other biological processes to OA (e.g. respiration and calcification). To better understand these effects, we conducted experiments on Porolithon onkodes, a common crustose coralline alga in Pacific coral reefs, crossing pCO₂ and light treatments. Results indicate OA inhibited some aspects of photophysiology (maximum photochemical efficien

SUBMITTER: Briggs AA 

PROVIDER: S-EPMC6408467 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature